Buffer overflow in Python Pillow
CVE-2026-25990
Pillow is a Python imaging library. From 10.3.0 to before 12.1.1, an out-of-bounds write may be triggered when loading a specially crafted PSD image. This vulnerability is fixed in 12.1.1.
Vulnerability class: Buffer Overflow
EPSS: 0.000 (2.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Python Pillow
- Python-pillow Pillow — versions >= 10.3.0, < 12.1.1
Weakness classification (CWE)
References
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-cfh3-3jmp-rvhc (x_refsource_CONFIRM, Vendor Advisory)
- https://github.com/python-pillow/Pillow/commit/9000313cc5d4a31bdcdd6d7f0781101abab553aa (Patch, x_refsource_MISC)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-25990?
- CVE-2026-25990 is a high-severity vulnerability in Python Pillow, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-02-11.
- How severe is CVE-2026-25990?
- High severity. CVSS v3 base score is 7.5 out of 10.